#include "apue.h"
int main(int argc, char *argv[]) {
	int val;
	if (argc != 2) {
		err_quit("usage: a.out <descriptor#>");
	}
	if ((val = fcntl(atoi(argv[1]), F_GETFL, 0)) < 0 ) {
		err_sys("fcntl error for fd %d", atoi(argv[1]));
	}

	switch (val & O_ACCMODE) {
		case O_RDONLY:
			printf("read only\n");
			break;
		case O_WRONLY:
			printf("write only\n");
			break;
		case O_RDWR:
			printf("read write\n");
			break;
		default:
			err_dump("unknown access mode");
	}

	if (val & O_APPEND)
		printf(", append");

	if (val & O_NONBLOCK)
		printf(", nonblocking");

	if (val & O_SYNC)
		printf(", synvhronous writes");

#if !defined(_POSIX_C_SOURCE) && defined(O_FSYNC) && (O_FSYNC != I_SYNC)
	if (val & O_FSYNC) {
		printf(", synchrounous write\n");
	}
#endif

	putchar('\n');
	exit(0);
}

